package com.jme3.asset.plugins;

/*
 * Copyright (c) 2009-2010 jMonkeyEngine
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * * Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * * Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * * Neither the name of 'jMonkeyEngine' nor the names of its contributors
 *   may be used to endorse or promote products derived from this software
 *   without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */


import com.jme3.asset.AssetInfo;
import com.jme3.asset.AssetKey;
import com.jme3.asset.AssetLocator;
import com.jme3.asset.AssetManager;
import com.jme3.system.JmeSystem;

import java.io.IOException;
import java.io.InputStream;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;


/**
 * <code>ZipLocator</code> is a locator that looks up resources in a .ZIP file.
 * @author Kirill Vainer
 */
public class AndroidZipLocator implements AssetLocator 
{
    private ZipInputStream zin = null;
    private String rootPath = "";
    private android.content.res.AssetManager androidManager;
    private static final Logger logger = Logger.getLogger(ZipLocator.class.getName());

    private class JarAssetInfo extends AssetInfo 
    {
        @SuppressWarnings("unused")
        private final ZipEntry entry;
    
        public JarAssetInfo(AssetManager manager, @SuppressWarnings("rawtypes") AssetKey key, ZipEntry entry){
            super(manager, key);
            this.entry = entry;
        }
    
        public InputStream openStream()
        {
            return zin;
        }
    }
    public AndroidZipLocator() 
    {
        androidManager = JmeSystem.getResources().getAssets();
    }
    
    public void setRootPath(String rootPath) 
    {
        this.rootPath = rootPath;
    }

    public AssetInfo locate(AssetManager manager, @SuppressWarnings("rawtypes") AssetKey key) 
    {
        try
        {                        
            if (zin != null)
            {
                zin.close();
                zin = null;
            }
            InputStream in = androidManager.open(rootPath);
            if (in != null) 
                zin = new ZipInputStream(in);
        }
        catch (IOException ex)
        {
            logger.log(Level.WARNING, "Failed to open zip file: " + rootPath, ex);         
            return null;
        }
        
        if (zin != null)
        {
            String name = key.getName();       
            ZipEntry entry = null;
            try
            {
                while ((entry = zin.getNextEntry()) != null) 
                {
                    if (entry.getName().equals(name))
                        break;
                    zin.closeEntry();
                }
                if (entry == null)
                    return null;
                    
                return new JarAssetInfo(manager, key, entry);
                
            }
            catch (IOException ex)
            {
                logger.log(Level.WARNING, "Failed to locate asset: " + name, ex);
            }
        }
        return null;
    }

}